EMWIN disseminates alerts, watches, warnings, observations, forecasts and climate products in text and image formats (see EMWIN Catalogs) via:

1. Satellite broadcast:

    - GOES-16 (East), GOES-17 (West) High Rate
      Information Transmission (HRIT) broadcast.

    - Freq/channels: 1694.1-MHz / 20,21,22

2. EMWIN FTP File Server:
   - Accessible on the public Internet.
 

1. Satellite broadcast reception:

     - HRIT Reception reception characteristics (NESDIS)

     - Commercial HRIT satellite terminal 
       Manufacturers list (NESDIS)

     - Fabricated HRIT satellite terminals built with
       components and parts available on the open market. 
       (Internet search "build goes-r receiver" for
       additional published information).

2. EMWIN FTP File Server:

     PC/workstation/mobile device with public Internet
     access
 

1. Satellite broadcast:

    - Commercial HRIT satellite terminals are generally equipped with all the required software. 
      Consult vendor for additional information.

    - Fabricated HRIT satellite terminals will require users to identify and acquire the necessary
      software. Information is available by searching the public Internet.  Government information on
     'demonstration software' developed for HRIT/EMWIN is available here:
      https://www.goes-r.gov/users/hrit-links.html   
 

2. EMWIN FTP File Server: 

    Web browsers, commercial applications or scripting software programs (e.g., Perl) may be
    used to access and download products.

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1.  Text Products are presented in WMO Bulletin format

     US products may include AWIPS Identifiers containing a descriptive

     product category code (see: AWIPS Category Codes (NNN)).

2.  Image Products are broadcast in their native file format with telltale file extensions:     

     JPG  - Joint Photographic Experts Group (JPEG) format

     PNG - Portable Network Graphics

     GIF   - Graphics Interchange Format
 

    Note: Products larger than 5 kilo-bytes in size are compressed into a .zip

     formatted file prior to broadcast and must be uncompressed to return the

     file to its original file format.

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1.  The EMWIN product stream creation and EMWIN FTP archive file server operations are
      monitored by NOAA Central Operations (NCO), NWS, 24x7.

2.  EMWIN satellite uplink and satellite broadcast services are monitor by NESDIS 24x7.

3.  EMWIN image product accountability is monitored by the Dissemination Systems Branch, NWS,
     daily.

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EMWIN broadcast services are open and available to the public 24x7:

1. EMWIN GOES-East/West satellite broadcast footprint:   see NESDIS HRIT Broadcast

2. EMWIN GOES-East/West satellite broadcast reception: see NESDIS HRIT Reception

3. EMWIN FTP File Server on the public Internet - URL:

1. HRIT/EMWIN Service Overview:

• GRB & HRIT/EMWIN Joint User Group Meeting

2.  Products on EMWIN broadcast services: 

• EMWIN_Text_Product_Catalog
• EMWIN Image Product Catalog 

3.  Service description:

• eEMWIN_FTP_Service_Description
• EMWIN GOES-R Filename Convention Document (Draft)
   

EMWIN disseminates national and international weather and water alerts and warnings, and US
non-weather emergency message alerts. Refer to  the EMWIN_Text_Product Catalog for a listing of product category codes (ref: US AWIPS Category Codes (NNN) ) and WMO product header included on the broadcast.

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1.  The status of EMWIN broadcast services is updated manually during normal business hours on
      the Home Page.

2.  EMWIN service issues impacting user operations should be reported immediately to:

      Tech Control:  Phone:  301-683-1518

                              - or -

                              eMail:  SDM@noaa.gov   ... and cc:

                                          nws.emwin.support@noaa.gov

3.  Questions regarding the broadcast products, adding or replacing broadcast products or
      broadcast product format should be addressed to: 

                                         nws.emwin.support@noaa.gov

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